diff --git a/Lib/test/test_csv.py b/Lib/test/test_csv.py
index d456759..88d5af7 100644
--- a/Lib/test/test_csv.py
+++ b/Lib/test/test_csv.py
@@ -1036,6 +1036,15 @@
         self.assertEqual(sniffer.has_header(self.header2 + self.sample8),
                          True)
 
+    def test_guess_quote_and_delimiter(self):
+        sniffer = csv.Sniffer()
+        for header in (";'123;4';", "'123;4';", ";'123;4'", "'123;4'"):
+            dialect = sniffer.sniff(header, ",;")
+            self.assertEqual(dialect.delimiter, ';')
+            self.assertEqual(dialect.quotechar, "'")
+            self.assertIs(dialect.doublequote, False)
+            self.assertIs(dialect.skipinitialspace, False)
+
     def test_sniff(self):
         sniffer = csv.Sniffer()
         dialect = sniffer.sniff(self.sample1)